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2 December, 10:34

If a1=47 and d=-5 find a12

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  1. 2 December, 10:51
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    An = a1 + (n-1) * d

    a12 = 47 + (12 - 1) * - 5

    a12 = 47 + 11 * - 5

    a12 = 47 - 55

    a12 = - 8 <==
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